Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a762a7be35c6e39d522fe23f56a62952a30c2db04ed9c3dd9497a1795ab22385:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^